%0 Journal Article
%T Mechanism and Kinetics of Phenol Degradation by TiO2 Photocatalytic Combined Technologies
TiO2光催化联合技术降解苯酚机制及动力学
%A ZHANG Yi
%A HUANG Ruo-nan
%A WANG Xiao-min
%A WANG Qi
%A CONG Yan-qing
%A
张轶
%A 黄若男
%A 王晓敏
%A 王齐
%A 丛燕青
%J 环境科学
%D 2013
%I
%X The combination H2O2 or electrical catalytic (EC) system with TiO2 photocatalytic system for phenol degradation was investigated. The catalytic systems of TiO2/UV, H2O2/UV, TiO2/UV/H2O2 and TiO2/UV/EC were compared to investigate the phenol degradation mechanism and kinetic model. The degradation of phenol in TiO2/UV/H2O2 and TiO2/UV/EC system is more effective than that in TiO2/UV system. With the solution pH of 6, TiO2 concentration of 0.2 g·L-1, UV illumination of 2 h, the photocatalysis removal efficiency of phenol reaches to 86%, if the current density of 12 mA·cm-2 is added, the removal efficiency of phenol could reach to 100%. The energy utilization in different catalytic systems was also compared. When phenol is degraded in 15 min, in TiO2/UV/EC system the energy utilization is the highest of 0.0306 g·(kW·h)-1 with the energy consumption of 0.0640 kW·h-1. It indicates that much more energy is used in TiO2/UV/EC system for phenol degradation. During the analysis of intermediate products in different catalysis systems, the first-order kinetic model of phenol degradation and intermediate products such as hydroquinone, catechol and benzoquinone formation were established. The kinetic model is validated the phenol degradation pathway in different catalysis systems, and also indicates the TiO2/UV/EC system could enhance phenol and intermediate products degradation.
%K phenol
%K TiO2
%K photocatalysis
%K degradation mechanism
%K kinetic model
苯酚
%K TiO2
%K 光催化
%K 降解机制
%K 动力学模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9C65539B20E123FC17862E04EF20685C&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=0B39A22176CE99FB&sid=6341CCF6B158C5F9&eid=70E3F4DEB0172F14&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=32